1 package antlr;
2
3 * <b>SOFTWARE RIGHTS</b>
5 * <p>
6 * ANTLR 2.5.0 MageLang Institute, 1998
7 * <p>
8 * We reserve no legal rights to the ANTLR--it is fully in the
9 * public domain. An individual or company may do whatever
10 * they wish with source code distributed with ANTLR or the
11 * code generated by ANTLR, including the incorporation of
12 * ANTLR, or its output, into commerical software.
13 * <p>
14 * We encourage users to develop software with ANTLR. However,
15 * we do ask that credit is given to us for developing
16 * ANTLR. By "credit", we mean that if you use ANTLR or
17 * incorporate any source code into one of your programs
18 * (commercial product, research project, or otherwise) that
19 * you acknowledge this fact somewhere in the documentation,
20 * research report, etc... If you like ANTLR and have
21 * developed a nice tool with the output, please mention that
22 * you developed it using ANTLR. In addition, we ask that the
23 * headers remain intact in our source code. As long as these
24 * guidelines are kept, we expect to continue enhancing this
25 * system and expect to make other tools available as they are
26 * completed.
27 * <p>
28 * The ANTLR gang:
29 * @version ANTLR 2.5.0 MageLang Institute, 1998
30 * @author Terence Parr, <a href=http://www.MageLang.com>MageLang Institute</a>
31 * @author <br>John Lilley, <a href=http://www.Empathy.com>Empathy Software</a>
32 */
33 * be rewound via mark()/rewind() methods.
35 * <p>
36 * A dynamic array is used to buffer up all the input characters. Normally,
37 * "k" characters are stored in the buffer. More characters may be stored during
38 * guess mode (testing syntactic predicate), or when LT(i>k) is referenced.
39 * Consumption of characters is deferred. In other words, reading the next
40 * character is not done by conume(), but deferred until needed by LA or LT.
41 * <p>
42 *
43 * @see antlr.CharQueue
44 */
45 import java.io.InputStream;
47 import java.io.IOException;
48
49 public class ByteBuffer extends InputBuffer{
50
51 transient InputStream input;
53
54
55
56 public ByteBuffer(InputStream input_) {
57 super();
58 input = input_;
59 }
60
61 public void fill(int amount) throws IOException
62 {
63 syncConsume();
64 while (queue.nbrEntries < amount + markerOffset) {
66 queue.append((char)input.read());
68 }
69 }
70 }
71